new_gist_buffering_test_cases.patch

diff --git a/src/test/regress/expected/gist.out b/src/test/regress/expected/gist.out
index a36b4c9c56..b5edc44250 100644
--- a/src/test/regress/expected/gist.out
+++ b/src/test/regress/expected/gist.out
@@ -387,6 +387,12 @@ select p from gist_tbl order by circle(p,1) <-> point(0,0) limit 1;
 
 select p from gist_tbl order by circle(p,1) <-> point(0,0) limit 1;
 ERROR:  lossy distance functions are not supported in index-only scans
+-- Build an index using buffering caused by a index build that don't fit on cache.
+set effective_cache_size = '1MB';
+create index gist_tbl_box_index_buffering on gist_tbl using gist (p, b, c);
+reset effective_cache_size;
+-- Force an index build using buffering.
+create index gist_tbl_box_index_forcing_buffering on gist_tbl using gist (p) with (buffering=on);
 -- Clean up
 reset enable_seqscan;
 reset enable_bitmapscan;
diff --git a/src/test/regress/sql/gist.sql b/src/test/regress/sql/gist.sql
index 3360266370..214366c157 100644
--- a/src/test/regress/sql/gist.sql
+++ b/src/test/regress/sql/gist.sql
@@ -169,6 +169,15 @@ explain (verbose, costs off)
 select p from gist_tbl order by circle(p,1) <-> point(0,0) limit 1;
 select p from gist_tbl order by circle(p,1) <-> point(0,0) limit 1;
 
+
+-- Build an index using buffering caused by a index build that don't fit on cache.
+set effective_cache_size = '1MB';
+create index gist_tbl_box_index_buffering on gist_tbl using gist (p, b, c);
+reset effective_cache_size;
+
+-- Force an index build using buffering.
+create index gist_tbl_box_index_forcing_buffering on gist_tbl using gist (p) with (buffering=on);
+
 -- Clean up
 reset enable_seqscan;
 reset enable_bitmapscan;